A group of loud, thuggish classmates who already use him as an errand boy finally take over his home. His quiet, secretly H-cup adult sister tries to defend him, but only makes them angrier. They grope her huge breasts and use her as a sex toy in a brutal four-way gang rape. It does not end after one day: they return every day for a week and turn the house into their hangout. As he watches his sister overwhelmed by pleasure and forced into complete submission, anger and jealousy twist together inside him—and, to his own disgust, he gets an erection.